21830465317 has 2 divisors, whose sum is σ = 21830465318. Its totient is φ = 21830465316.

The previous prime is 21830465299. The next prime is 21830465339. The reversal of 21830465317 is 71356403812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17226300001 + 4604165316 = 131249^2 + 67854^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21830465317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21830465317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21830469317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10915232658 + 10915232659.

It is an arithmetic number, because the mean of its divisors is an integer number (10915232659).

Almost surely, 2^21830465317 is an apocalyptic number.

It is an amenable number.

21830465317 is a deficient number, since it is larger than the sum of its proper divisors (1).

21830465317 is an equidigital number, since it uses as much as digits as its factorization.

21830465317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 21830465317 in words is "twenty-one billion, eight hundred thirty million, four hundred sixty-five thousand, three hundred seventeen".